Look for rain to spread into the region Thursday afternoon, but forecasters with the National Weather Service in Portland say the "stretched-out" system will bring "unimpressive" rainfall totals.

The front will keep showers over northwest Oregon on Friday, with snow levels down to mountain passes at around 4,000 feet; snowfall totals also will be unimpressive.

Another series of fronts will bring more showers Saturday and again Saturday night, but snow levels will start to rise. The rain will stick around Sunday before the sky begins to clear late Sunday into Monday.

All signs point to strengthening high pressure by Monday, when temperatures will spike into the low- to mid-70s, well above average for the date.

Forecast models are struggling to keep the warm weather in place, with one showing a low pressure system sneaking through the ridge of high pressure, while another model sends it south, keeping the warm temperatures beyond Tuesday into late next week.